Gypsum, popular sulfate mineral of excellent business worth, made up of hydrated calcium sulfate (CaSO4·2H2O). In perfectly-developed crystals the mineral generally has been termed selenite. The fibrous substantial wide variety provides a silky lustre and known as satin spar; it is translucent and opalescent and is valued for ornaments and https://www.propanraya.com/id/produk/eco-gypsum-ee-4050